Colormag demo import failed on Localhost/ IIS Server 10

Hi there!
I got the following error”Import Failed” when trying to import the de for the colormag theme.
The import is able to get the images but don’t display them
Below is my system config:

== System Info ==
Operating System: WINNT
Server: Microsoft-IIS/10.0
MySQL Version: 8.0.19
PHP Version: 7.4.8
PHP Max Execution Time: 360
PHP Max Upload Size: 100M
PHP Post Max Size: 100M
PHP Max Input Vars: 3000
PHP Memory Limit: 256M
cURL Installed: Yes
cURL version: 7.70.0
GD Installed: Yes
GD version: bundled (2.1.0 compatible)
Write Permission: All Fine
Demo Pack Server Connection: Connected

== WordPress Info ==
Version: 5.5
Site URL: https://localhost
Home URL: https://localhost
Multisite: No
Max Upload Size: 100 MB
Memory Limit: 40M
Max Memory Limit: 256M
Permalink Structure: /%postname%/
Language: en-US
Debug Mode Enabled: No
Script Debug Mode Enabled: No
ThemeGrill Demo Importer Version: 1.6.6

== Theme Info ==
Name: ColorMag
Version: 2.0.0.3
Author: ThemeGrill
Author URL: https://themegrill.com
Child Theme: No

== Active Plugins ==
Akismet Anti-Spam – 4.1.6 By Automattic
Everest Forms – 1.7.0.3 By WPEverest
Hello Dolly – 1.7.2 By Matt Mullenweg
HootKit – 1.1.1 By wphoot
ThemeGrill Demo Importer – 1.6.6 By ThemeGrill
WooCommerce – 4.4.1 By Automattic
WP-ServerInfo – 1.66 By Lester ‘GaMerZ’ Chan
WPForms Lite – 1.6.2.2 By WPForms

== Inactive Plugins ==

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